import matplotlib.pyplot as plt
import numpy as np
import PIL
import tensorflow as tf
import pathlib

from tensorflow import keras
from tensorflow.keras import layers
from tensorflow.keras.models import Sequential

This tutorial uses a dataset of animal photos. The dataset contains five sub-directories, one per class:

location = D:\datasets\iNaturalCleaned

D:\datasets\iNaturalCleaned\blackBear
D:\datasets\iNaturalCleaned\coyote
D:\datasets\iNaturalCleaned\ruffedGrouse
D:\datasets\iNaturalCleaned\turkey
D:\datasets\iNaturalCleaned\whitetailDeer

# Specify the location of your dataset
data_dir = pathlib.Path(r'D:\datasets\iNaturalCleaned_temp')

# Count the number of images
image_count = len(list(data_dir.glob('*/*.jpg')))
print(f"Total number of images: {image_count}")

# Example: Load and display an image from the 'blackBear' folder
black_bears = list(data_dir.glob('blackBear/*'))
PIL.Image.open(str(black_bears[0]))

Total number of images: 25000

PIL.Image.open(str(black_bears[1]))

Load data using a Keras utility

Next, load these images off disk using the helpful tf.keras.utils.image_dataset_from_directory utility. This will take you from a directory of images on disk to a tf.data.Dataset in just a couple lines of code. If you like, you can also write your own data loading code from scratch by visiting the Load and preprocess images tutorial.

Create a dataset

Define some parameters for the loader:

batch_size = 32
img_height = 180
img_width = 180

It's good practice to use a validation split when developing your model. Use 80% of the images for training and 20% for validation.

train_ds = tf.keras.utils.image_dataset_from_directory(
  data_dir,
  validation_split=0.2,
  subset="training",
  seed=123,
  image_size=(img_height, img_width),
  batch_size=batch_size)

Found 25000 files belonging to 5 classes.
Using 20000 files for training.

val_ds = tf.keras.utils.image_dataset_from_directory(
  data_dir,
  validation_split=0.2,
  subset="validation",
  seed=123,
  image_size=(img_height, img_width),
  batch_size=batch_size)

Found 25000 files belonging to 5 classes.
Using 5000 files for validation.

You can find the class names in the class_names attribute on these datasets. These correspond to the directory names in alphabetical order.

class_names = train_ds.class_names
print(class_names)

['blackBear', 'coyote', 'ruffedGrouse', 'turkey', 'whitetailDeer']

Visualize the data

Here are the first nine images from the training dataset:

import matplotlib.pyplot as plt

plt.figure(figsize=(10, 10))
for images, labels in train_ds.take(1):
  for i in range(9):
    ax = plt.subplot(3, 3, i + 1)
    plt.imshow(images[i].numpy().astype("uint8"))
    plt.title(class_names[labels[i]])
    plt.axis("off")

Configure the dataset for performance

Make sure to use buffered prefetching, so you can yield data from disk without having I/O become blocking. These are two important methods you should use when loading data:

• Dataset.cache keeps the images in memory after they're loaded off disk during the first epoch. This will ensure the dataset does not become a bottleneck while training your model. If your dataset is too large to fit into memory, you can also use this method to create a performant on-disk cache.
• Dataset.prefetch overlaps data preprocessing and model execution while training.

Interested readers can learn more about both methods, as well as how to cache data to disk in the Prefetching section of the Better performance with the tf.data API guide.

AUTOTUNE = tf.data.AUTOTUNE

train_ds = train_ds.cache().shuffle(1000).prefetch(buffer_size=AUTOTUNE)
val_ds = val_ds.cache().prefetch(buffer_size=AUTOTUNE)

Standardize the data

The RGB channel values are in the [0, 255] range. This is not ideal for a neural network; in general you should seek to make your input values small.

Here, you will standardize values to be in the [0, 1] range by using tf.keras.layers.Rescaling:

normalization_layer = layers.Rescaling(1./255)

There are two ways to use this layer. You can apply it to the dataset by calling Dataset.map:

normalized_ds = train_ds.map(lambda x, y: (normalization_layer(x), y))
image_batch, labels_batch = next(iter(normalized_ds))
first_image = image_batch[0]
# Notice the pixel values are now in `[0,1]`.
print(np.min(first_image), np.max(first_image))

0.013108058 1.0

A basic Keras model

Create the model

The Keras Sequential model consists of three convolution blocks (tf.keras.layers.Conv2D) with a max pooling layer (tf.keras.layers.MaxPooling2D) in each of them. There's a fully-connected layer (tf.keras.layers.Dense) with 128 units on top of it that is activated by a ReLU activation function ('relu'). This model has not been tuned for high accuracy; the goal of this tutorial is to show a standard approach.

num_classes = len(class_names)

model = Sequential([
  layers.Rescaling(1./255, input_shape=(img_height, img_width, 3)),
  layers.Conv2D(16, 3, padding='same', activation='relu'),
  layers.MaxPooling2D(),
  layers.Conv2D(32, 3, padding='same', activation='relu'),
  layers.MaxPooling2D(),
  layers.Conv2D(64, 3, padding='same', activation='relu'),
  layers.MaxPooling2D(),
  layers.Flatten(),
  layers.Dense(128, activation='relu'),
  layers.Dense(num_classes)
])

c:\Users\kdlor\AppData\Local\Programs\Python\Python310\lib\site-packages\keras\src\layers\preprocessing\tf_data_layer.py:19: UserWarning: Do not pass an `input_shape`/`input_dim` argument to a layer. When using Sequential models, prefer using an `Input(shape)` object as the first layer in the model instead.
  super().__init__(**kwargs)

Compile the model

For this tutorial, choose the tf.keras.optimizers.Adam optimizer and tf.keras.losses.SparseCategoricalCrossentropy loss function. To view training and validation accuracy for each training epoch, pass the metrics argument to Model.compile.

model.compile(optimizer='adam',
              loss=tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True),
              metrics=['accuracy'])

Model summary

View all the layers of the network using the Keras Model.summary method:

model.summary()

Model: "sequential"

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Layer (type)                    ┃ Output Shape           ┃       Param # ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ rescaling_1 (Rescaling)         │ (None, 180, 180, 3)    │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d (Conv2D)                 │ (None, 180, 180, 16)   │           448 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d (MaxPooling2D)    │ (None, 90, 90, 16)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d_1 (Conv2D)               │ (None, 90, 90, 32)     │         4,640 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d_1 (MaxPooling2D)  │ (None, 45, 45, 32)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d_2 (Conv2D)               │ (None, 45, 45, 64)     │        18,496 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d_2 (MaxPooling2D)  │ (None, 22, 22, 64)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ flatten (Flatten)               │ (None, 30976)          │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ dense (Dense)                   │ (None, 128)            │     3,965,056 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ dense_1 (Dense)                 │ (None, 5)              │           645 │
└─────────────────────────────────┴────────────────────────┴───────────────┘

 Total params: 3,989,285 (15.22 MB)

 Trainable params: 3,989,285 (15.22 MB)

 Non-trainable params: 0 (0.00 B)

Train the model

Train the model for 10 epochs with the Keras Model.fit method:

epochs=10
history = model.fit(
  train_ds,
  validation_data=val_ds,
  epochs=epochs
)

Epoch 1/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 122s 194ms/step - accuracy: 0.3134 - loss: 1.5398 - val_accuracy: 0.4462 - val_loss: 1.3435
Epoch 2/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 83s 133ms/step - accuracy: 0.4771 - loss: 1.2815 - val_accuracy: 0.5048 - val_loss: 1.2524
Epoch 3/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 75s 121ms/step - accuracy: 0.5545 - loss: 1.1286 - val_accuracy: 0.4992 - val_loss: 1.2619
Epoch 4/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 74s 118ms/step - accuracy: 0.6602 - loss: 0.8962 - val_accuracy: 0.4866 - val_loss: 1.3946
Epoch 5/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 74s 118ms/step - accuracy: 0.7625 - loss: 0.6279 - val_accuracy: 0.4948 - val_loss: 1.6760
Epoch 6/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 74s 119ms/step - accuracy: 0.8685 - loss: 0.3799 - val_accuracy: 0.4836 - val_loss: 2.1524
Epoch 7/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 74s 118ms/step - accuracy: 0.9256 - loss: 0.2260 - val_accuracy: 0.4672 - val_loss: 2.5256
Epoch 8/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 77s 124ms/step - accuracy: 0.9563 - loss: 0.1435 - val_accuracy: 0.4734 - val_loss: 3.1564
Epoch 9/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 75s 120ms/step - accuracy: 0.9715 - loss: 0.0976 - val_accuracy: 0.4534 - val_loss: 3.8991
Epoch 10/10
625/625 ━━━━━━━━━━━━━━━━━━━━ 76s 122ms/step - accuracy: 0.9772 - loss: 0.0823 - val_accuracy: 0.4786 - val_loss: 4.1128

Epoch 1/10
194ms/step - accuracy: 0.3134 - loss: 1.5398 - val_accuracy: 0.4462 - val_loss: 1.3435

Epoch 2/10
133ms/step - accuracy: 0.4771 - loss: 1.2815 - val_accuracy: 0.5048 - val_loss: 1.2524

Epoch 3/10
121ms/step - accuracy: 0.5545 - loss: 1.1286 - val_accuracy: 0.4992 - val_loss: 1.2619

Epoch 4/10
118ms/step - accuracy: 0.6602 - loss: 0.8962 - val_accuracy: 0.4866 - val_loss: 1.3946

Epoch 5/10
118ms/step - accuracy: 0.7625 - loss: 0.6279 - val_accuracy: 0.4948 - val_loss: 1.6760

Epoch 6/10
119ms/step - accuracy: 0.8685 - loss: 0.3799 - val_accuracy: 0.4836 - val_loss: 2.1524

Epoch 7/10
118ms/step - accuracy: 0.9256 - loss: 0.2260 - val_accuracy: 0.4672 - val_loss: 2.5256

Epoch 8/10
124ms/step - accuracy: 0.9563 - loss: 0.1435 - val_accuracy: 0.4734 - val_loss: 3.1564

Epoch 9/10
120ms/step - accuracy: 0.9715 - loss: 0.0976 - val_accuracy: 0.4534 - val_loss: 3.8991

Epoch 10/10
122ms/step - accuracy: 0.9772 - loss: 0.0823 - val_accuracy: 0.4786 - val_loss: 4.1128

The increase in accuracy but decrease in validation accuracy is said to be a sign of overfitting or can also be a sign that the dataset is to complex for the size of the dataset that uou are using to train it.

Solutions

• Increase dataset size (artifically using data augmenation if can not get mroe data)
• Stop early when validation accuracy starts to dip

Visualize training results

Create plots of the loss and accuracy on the training and validation sets:

acc = history.history['accuracy']
val_acc = history.history['val_accuracy']

loss = history.history['loss']
val_loss = history.history['val_loss']

epochs_range = range(epochs)

plt.figure(figsize=(8, 8))
plt.subplot(1, 2, 1)
plt.plot(epochs_range, acc, label='Training Accuracy')
plt.plot(epochs_range, val_acc, label='Validation Accuracy')
plt.legend(loc='lower right')
plt.title('Training and Validation Accuracy')

plt.subplot(1, 2, 2)
plt.plot(epochs_range, loss, label='Training Loss')
plt.plot(epochs_range, val_loss, label='Validation Loss')
plt.legend(loc='upper right')
plt.title('Training and Validation Loss')
plt.show()

Overfitting

In the plots above, the training accuracy is increasing linearly over time, whereas validation accuracy stalls around 60% in the training process. Also, the difference in accuracy between training and validation accuracy is noticeable—a sign of overfitting.

When there are a small number of training examples, the model sometimes learns from noises or unwanted details from training examples—to an extent that it negatively impacts the performance of the model on new examples. This phenomenon is known as overfitting. It means that the model will have a difficult time generalizing on a new dataset.

There are multiple ways to fight overfitting in the training process. In this tutorial, you'll use data augmentation and add dropout to your model.

Data augmentation

Overfitting generally occurs when there are a small number of training examples. Data augmentation takes the approach of generating additional training data from your existing examples by augmenting them using random transformations that yield believable-looking images. This helps expose the model to more aspects of the data and generalize better.

You will implement data augmentation using the following Keras preprocessing layers: tf.keras.layers.RandomFlip, tf.keras.layers.RandomRotation, and tf.keras.layers.RandomZoom. These can be included inside your model like other layers, and run on the GPU.

data_augmentation = keras.Sequential(
  [
    layers.RandomFlip("horizontal",
                      input_shape=(img_height,
                                  img_width,
                                  3)),
    layers.RandomRotation(0.1),
    layers.RandomZoom(0.1),
  ]
)

c:\Users\kdlor\Documents\Documents\projects\trainingTrailSort\venv\lib\site-packages\keras\src\layers\preprocessing\tf_data_layer.py:19: UserWarning: Do not pass an `input_shape`/`input_dim` argument to a layer. When using Sequential models, prefer using an `Input(shape)` object as the first layer in the model instead.
  super().__init__(**kwargs)

Visualize a few augmented examples by applying data augmentation to the same image several times:

plt.figure(figsize=(10, 10))
for images, _ in train_ds.take(1):
  for i in range(9):
    augmented_images = data_augmentation(images)
    ax = plt.subplot(3, 3, i + 1)
    plt.imshow(augmented_images[0].numpy().astype("uint8"))
    plt.axis("off")

You will add data augmentation to your model before training in the next step.

Dropout

Another technique to reduce overfitting is to introduce dropout{:.external} regularization to the network.

When you apply dropout to a layer, it randomly drops out (by setting the activation to zero) a number of output units from the layer during the training process. Dropout takes a fractional number as its input value, in the form such as 0.1, 0.2, 0.4, etc. This means dropping out 10%, 20% or 40% of the output units randomly from the applied layer.

Create a new neural network with tf.keras.layers.Dropout before training it using the augmented images:

num_classes = len(class_names)

model = Sequential([
  data_augmentation,
  layers.Rescaling(1./255),
  layers.Conv2D(16, 3, padding='same', activation='relu'),
  layers.MaxPooling2D(),
  layers.Conv2D(32, 3, padding='same', activation='relu'),
  layers.MaxPooling2D(),
  layers.Conv2D(64, 3, padding='same', activation='relu'),
  layers.MaxPooling2D(),
  layers.Dropout(0.2),
  layers.Flatten(),
  layers.Dense(128, activation='relu'),
  layers.Dense(num_classes, name="outputs")
])

Compile and train the model

model.compile(optimizer='adam',
              loss=tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True),
              metrics=['accuracy'])

model.summary()

Model: "sequential_1"

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Layer (type)                    ┃ Output Shape           ┃       Param # ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ sequential (Sequential)         │ (None, 180, 180, 3)    │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ rescaling_1 (Rescaling)         │ (None, 180, 180, 3)    │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d (Conv2D)                 │ (None, 180, 180, 16)   │           448 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d (MaxPooling2D)    │ (None, 90, 90, 16)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d_1 (Conv2D)               │ (None, 90, 90, 32)     │         4,640 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d_1 (MaxPooling2D)  │ (None, 45, 45, 32)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d_2 (Conv2D)               │ (None, 45, 45, 64)     │        18,496 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d_2 (MaxPooling2D)  │ (None, 22, 22, 64)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ dropout (Dropout)               │ (None, 22, 22, 64)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ flatten (Flatten)               │ (None, 30976)          │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ dense (Dense)                   │ (None, 128)            │     3,965,056 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ outputs (Dense)                 │ (None, 5)              │           645 │
└─────────────────────────────────┴────────────────────────┴───────────────┘

 Total params: 3,989,285 (15.22 MB)

 Trainable params: 3,989,285 (15.22 MB)

 Non-trainable params: 0 (0.00 B)

epochs = 15
history = model.fit(
  train_ds,
  validation_data=val_ds,
  epochs=epochs
)

Epoch 1/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 137s 217ms/step - accuracy: 0.3210 - loss: 1.5442 - val_accuracy: 0.4248 - val_loss: 1.3962
Epoch 2/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 101s 162ms/step - accuracy: 0.4287 - loss: 1.3762 - val_accuracy: 0.4246 - val_loss: 1.3487
Epoch 3/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 108s 173ms/step - accuracy: 0.4685 - loss: 1.3084 - val_accuracy: 0.4654 - val_loss: 1.3306
Epoch 4/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 102s 164ms/step - accuracy: 0.4772 - loss: 1.2815 - val_accuracy: 0.4602 - val_loss: 1.3187
Epoch 5/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 95s 152ms/step - accuracy: 0.5048 - loss: 1.2415 - val_accuracy: 0.4730 - val_loss: 1.3121
Epoch 6/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 91s 145ms/step - accuracy: 0.5132 - loss: 1.2170 - val_accuracy: 0.5002 - val_loss: 1.2572
Epoch 7/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 91s 145ms/step - accuracy: 0.5193 - loss: 1.2069 - val_accuracy: 0.5016 - val_loss: 1.2552
Epoch 8/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 91s 146ms/step - accuracy: 0.5354 - loss: 1.1768 - val_accuracy: 0.4942 - val_loss: 1.2953
Epoch 9/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 91s 146ms/step - accuracy: 0.5365 - loss: 1.1541 - val_accuracy: 0.5190 - val_loss: 1.2076
Epoch 10/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 90s 144ms/step - accuracy: 0.5435 - loss: 1.1462 - val_accuracy: 0.5412 - val_loss: 1.1657
Epoch 11/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 92s 146ms/step - accuracy: 0.5612 - loss: 1.1167 - val_accuracy: 0.5348 - val_loss: 1.1887
Epoch 12/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 91s 145ms/step - accuracy: 0.5681 - loss: 1.1054 - val_accuracy: 0.5260 - val_loss: 1.1933
Epoch 13/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 91s 145ms/step - accuracy: 0.5756 - loss: 1.0847 - val_accuracy: 0.5108 - val_loss: 1.2935
Epoch 14/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 92s 147ms/step - accuracy: 0.5749 - loss: 1.0737 - val_accuracy: 0.5594 - val_loss: 1.1477
Epoch 15/15
625/625 ━━━━━━━━━━━━━━━━━━━━ 96s 153ms/step - accuracy: 0.5843 - loss: 1.0615 - val_accuracy: 0.5418 - val_loss: 1.1733

Previous time doing the same thing

Epoch 1/15
215ms/step - accuracy: 0.2825 - loss: 1.5680 - val_accuracy: 0.3832 - val_loss: 1.5136

Epoch 2/15
152ms/step - accuracy: 0.4165 - loss: 1.3973 - val_accuracy: 0.4236 - val_loss: 1.4027

Epoch 3/15
151ms/step - accuracy: 0.4478 - loss: 1.3377 - val_accuracy: 0.4598 - val_loss: 1.3404

Epoch 4/15
151ms/step - accuracy: 0.4737 - loss: 1.2900 - val_accuracy: 0.4586 - val_loss: 1.3355

Epoch 5/15
151ms/step - accuracy: 0.4913 - loss: 1.2618 - val_accuracy: 0.4654 - val_loss: 1.3254

Epoch 6/15
151ms/step - accuracy: 0.4963 - loss: 1.2385 - val_accuracy: 0.4770 - val_loss: 1.2963

Epoch 7/15
151ms/step - accuracy: 0.5116 - loss: 1.2181 - val_accuracy: 0.4754 - val_loss: 1.3453

Epoch 8/15
151ms/step - accuracy: 0.5206 - loss: 1.2000 - val_accuracy: 0.5098 - val_loss: 1.2188

Epoch 9/15
151ms/step - accuracy: 0.5265 - loss: 1.1655 - val_accuracy: 0.5108 - val_loss: 1.2243

Epoch 10/15
151ms/step - accuracy: 0.5457 - loss: 1.1380 - val_accuracy: 0.5196 - val_loss: 1.1765

Epoch 11/15
151ms/step - accuracy: 0.5482 - loss: 1.1397 - val_accuracy: 0.5320 - val_loss: 1.1699

Epoch 12/15
151ms/step - accuracy: 0.5574 - loss: 1.1225 - val_accuracy: 0.5270 - val_loss: 1.2081

Epoch 13/15
152ms/step - accuracy: 0.5548 - loss: 1.1136 - val_accuracy: 0.5234 - val_loss: 1.2154

Epoch 14/15
151ms/step - accuracy: 0.5651 - loss: 1.1079 - val_accuracy: 0.5278 - val_loss: 1.1973

Epoch 15/15
152ms/step - accuracy: 0.5640 - loss: 1.0999 - val_accuracy: 0.5364 - val_loss: 1.1767

Visualize training results

After applying data augmentation and tf.keras.layers.Dropout, there is less overfitting than before, and training and validation accuracy are closer aligned:

acc = history.history['accuracy']
val_acc = history.history['val_accuracy']

loss = history.history['loss']
val_loss = history.history['val_loss']

epochs_range = range(epochs)

plt.figure(figsize=(8, 8))
plt.subplot(1, 2, 1)
plt.plot(epochs_range, acc, label='Training Accuracy')
plt.plot(epochs_range, val_acc, label='Validation Accuracy')
plt.legend(loc='lower right')
plt.title('Training and Validation Accuracy')

plt.subplot(1, 2, 2)
plt.plot(epochs_range, loss, label='Training Loss')
plt.plot(epochs_range, val_loss, label='Validation Loss')
plt.legend(loc='upper right')
plt.title('Training and Validation Loss')
plt.show()

Predict on new data

Use your model to classify an image that wasn't included in the training or validation sets.

Note: Data augmentation and dropout layers are inactive at inference time.

Test out different animal images here

import os

# Specify the location of your dataset
image_path = pathlib.Path(r'D:\datasets\iNaturalCleaned')

test_image = list(image_path.glob('blackBear/*'))
test_image_path = (test_image[5654])
PIL.Image.open(str(test_image[5654]))

img = tf.keras.utils.load_img(
    test_image_path, target_size=(img_height, img_width)
)
img_array = tf.keras.utils.img_to_array(img)
img_array = tf.expand_dims(img_array, 0) # Create a batch

predictions = model.predict(img_array)
score = tf.nn.softmax(predictions[0])

print(
    "This image most likely belongs to {} with a {:.2f} percent confidence."
    .format(class_names[np.argmax(score)], 100 * np.max(score))
)

1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 346ms/step
This image most likely belongs to blackBear with a 84.33 percent confidence.

import os

# Specify the location of your dataset
image_path = pathlib.Path(r'D:\datasets\iNaturalCleaned')

test_image = list(image_path.glob('whitetailDeer/*'))
test_image_path = (test_image[5601])
PIL.Image.open(str(test_image[5601]))

img = tf.keras.utils.load_img(
    test_image_path, target_size=(img_height, img_width)
)
img_array = tf.keras.utils.img_to_array(img)
img_array = tf.expand_dims(img_array, 0) # Create a batch

predictions = model.predict(img_array)
score = tf.nn.softmax(predictions[0])

print(
    "This image most likely belongs to {} with a {:.2f} percent confidence."
    .format(class_names[np.argmax(score)], 100 * np.max(score))
)

1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 33ms/step
This image most likely belongs to whitetailDeer with a 58.81 percent confidence.

import os

# Specify the location of your dataset
image_path = pathlib.Path(r'D:\datasets\iNaturalCleaned')

test_image = list(image_path.glob('ruffedGrouse/*'))
test_image_path = (test_image[5656])
PIL.Image.open(str(test_image[5656]))

img = tf.keras.utils.load_img(
    test_image_path, target_size=(img_height, img_width)
)
img_array = tf.keras.utils.img_to_array(img)
img_array = tf.expand_dims(img_array, 0) # Create a batch

predictions = model.predict(img_array)
score = tf.nn.softmax(predictions[0])

print(
    "This image most likely belongs to {} with a {:.2f} percent confidence."
    .format(class_names[np.argmax(score)], 100 * np.max(score))
)

1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 20ms/step
This image most likely belongs to blackBear with a 90.68 percent confidence.

import os

# Specify the location of your dataset
image_path = pathlib.Path(r'D:\datasets\iNaturalCleaned')

test_image = list(image_path.glob('turkey/*'))
test_image_path = (test_image[5655])
PIL.Image.open(str(test_image[5655]))

img = tf.keras.utils.load_img(
    test_image_path, target_size=(img_height, img_width)
)
img_array = tf.keras.utils.img_to_array(img)
img_array = tf.expand_dims(img_array, 0) # Create a batch

predictions = model.predict(img_array)
score = tf.nn.softmax(predictions[0])

print(
    "This image most likely belongs to {} with a {:.2f} percent confidence."
    .format(class_names[np.argmax(score)], 100 * np.max(score))
)

1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 22ms/step
This image most likely belongs to blackBear with a 38.86 percent confidence.

import os

# Specify the location of your dataset
image_path = pathlib.Path(r'D:\datasets\iNaturalCleaned')

test_image = list(image_path.glob('coyote/*'))
test_image_path = (test_image[5604])
PIL.Image.open(str(test_image[5604]))

img = tf.keras.utils.load_img(
    test_image_path, target_size=(img_height, img_width)
)
img_array = tf.keras.utils.img_to_array(img)
img_array = tf.expand_dims(img_array, 0) # Create a batch

predictions = model.predict(img_array)
score = tf.nn.softmax(predictions[0])

print(
    "This image most likely belongs to {} with a {:.2f} percent confidence."
    .format(class_names[np.argmax(score)], 100 * np.max(score))
)

1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 24ms/step
This image most likely belongs to turkey with a 51.24 percent confidence.

Save base model

# Save the model
model.save(r'C:\Users\kdlor\Documents\Documents\projects\trainingTrailSort\trailSortTF2.keras')

Running Model

Load the Model

import tensorflow as tf

# Load the model
savedModel = tf.keras.models.load_model(r'C:\Users\kdlor\Documents\Documents\projects\trainingTrailSort\trailSortTF2.keras')
savedModel.summary()

Model: "sequential_1"

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Layer (type)                    ┃ Output Shape           ┃       Param # ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ sequential (Sequential)         │ (None, 180, 180, 3)    │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ rescaling_1 (Rescaling)         │ (None, 180, 180, 3)    │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d (Conv2D)                 │ (None, 180, 180, 16)   │           448 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d (MaxPooling2D)    │ (None, 90, 90, 16)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d_1 (Conv2D)               │ (None, 90, 90, 32)     │         4,640 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d_1 (MaxPooling2D)  │ (None, 45, 45, 32)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ conv2d_2 (Conv2D)               │ (None, 45, 45, 64)     │        18,496 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ max_pooling2d_2 (MaxPooling2D)  │ (None, 22, 22, 64)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ dropout (Dropout)               │ (None, 22, 22, 64)     │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ flatten (Flatten)               │ (None, 30976)          │             0 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ dense (Dense)                   │ (None, 128)            │     3,965,056 │
├─────────────────────────────────┼────────────────────────┼───────────────┤
│ outputs (Dense)                 │ (None, 5)              │           645 │
└─────────────────────────────────┴────────────────────────┴───────────────┘

 Total params: 11,967,857 (45.65 MB)

 Trainable params: 3,989,285 (15.22 MB)

 Non-trainable params: 0 (0.00 B)

 Optimizer params: 7,978,572 (30.44 MB)

Prepare Input Data

You need to preprocess the input data (images) similarly to how you did when training the model. This typically includes resizing the image and normalizing pixel values.

from tensorflow.keras.preprocessing import image
import numpy as np

def load_and_preprocess_image(img_path, target_size):
    # Load the image
    img = image.load_img(img_path, target_size=target_size)
    img_array = image.img_to_array(img)  # Convert to array
    img_array = img_array / 255.0  # Normalize to [0, 1]
    img_array = np.expand_dims(img_array, axis=0)  # Create a batch
    return img_array

Predictions

import os
import pathlib
import PIL

img_height = 180
img_width = 180
# Define the target size as per your model's input shape
target_size = (img_height, img_width)  # Set this according to your model

# Specify the location of your dataset
image_path = pathlib.Path(r'D:\datasets\iNaturalCleaned')

test_image = list(image_path.glob('blackBear/*'))
test_image_path = (test_image[5654])
PIL.Image.open(str(test_image[5654]))

# class_names = 0,1,2,3,4, - blackBear,coyote,ruffedGrouse,turkey,whitetailDeer
class_names = ["blackBear", "coyote", "ruffedGrouse", "turkey", "whitetailDeer"]

img = tf.keras.utils.load_img(
    test_image_path, target_size=(img_height, img_width)
)
img_array = tf.keras.utils.img_to_array(img)
img_array = tf.expand_dims(img_array, 0) # Create a batch

predictions = savedModel.predict(img_array)
score = tf.nn.softmax(predictions[0])

print(
    "This image most likely belongs to {} with a {:.2f} percent confidence."
    .format(class_names[np.argmax(score)], 100 * np.max(score))
)

1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 24ms/step
This image most likely belongs to blackBear with a 84.33 percent confidence.
1/1 ━━━━━━━━━━━━━━━━━━━━ 0s 24ms/step
This image most likely belongs to blackBear with a 84.33 percent confidence.